I've been using a Pioneer VSX 323 AV receiver and Tannoy TFX 5.1 speaker package, and the sound quality has been very satisfactory when watching blu-rays in surround sound. The same can't be said when streaming MP3s on my PS3 in stereo mode however. It's hard to describe, but the sound seems to lack depth and sounds flat overall, particularly during sections with lots of bass. I've tried switching between some of the presets designed for music such as Classic/Pop, Classical etc but this only sounds worse, and adjusting the bass through the AV receiver doesn't seem to make much difference either. It sounds better on my PC speakers which seems odd considering I paid considerably more for the receiver and speakers. Are there any settings I've yet to discover anyone would recommend for improving MP3 playback?